<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        html {
            font-size: 20px;
        }
        .active {
            text-decoration: underline;
        }
        .error {
            color: tomato;
        }
        .checked {
            font-weight: 900;
        }
        .demo{
            font-size: 14px;
        }
        .demo:hover{
            font-size: 18px;
            color: tomato;
            font-weight: 900;
        }
    </style>
</head>
<body>
    <div id="app">
        <p style="font-size: 2rem;">v-bind绑定class的数组语法以及绑定style</p>
        <p :class="[activeClass,errorClass,checkedClass]">绑定class的数组语法-基础版</p>
        <p :class="[isActive ? 'active' : '',errorClass]">
            绑定class的数组语-包含三元表达式
            <button @click="changeClass">toggle</button>
        </p>
             <!-- [{[activeClass]: isActive},errorClass] -->
        <p :class="[{active: isActive},errorClass]">
            绑定class的数组语-数组套对象
            <button @click="changeClass">toggle</button>
        </p>
        <hr>
        <hr>
        <hr>
        <p :style="{fontSize:size+'px',color:textColor}">绑定style</p>
        <input type="text" v-model="size">
        <p :style="styleObj">绑定style-obj</p>
        <p :style="[styleObj,style2]">绑定style-数组</p>
        <p class="demo" :style="{transition: time}">style自动添加前缀</p>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        let vm = new Vue({
            el: '#app',
            data: {
                activeClass: 'active',
                errorClass: 'error',
                checkedClass: 'checked',
                isActive: true,
                size: '20',
                textColor: '#56a5f1',
                styleObj: {
                    cursor: 'pointer',
                    'font-weight': 900,
                },
                style2: {
                    color: 'green'
                },
                time: '2s'
            },
            methods: {
                changeClass(){
                    this.isActive = !this.isActive
                }
            },
        })
    </script>
</body>
</html>